Metallic packing.



F. HBNNEBUHLE. METALLIC PACKING.

APPLICATION FILED MAR. 20, 1909.

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' METALLIC PACKING. APPLICATION TILED an. 20', 1909.

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Patented J UNITED STATES PATENT FFIGE.

FRANK HENNEBGHLE, OF CHICAGO, ILLINOIS.

METALLIC PACKING.

To all whom it may concern:

Be it known that I, FRANK HENNEBoHLE, a citizen of the United States,residing at Chicago, in the county of Cook and State of Illinois, haveinvented certain new and useful Improvements in Metallic Packing, ofwhich the following is a specification.

This invention relates to packing for piston rods and otherreciprocating and rotating rods and shafts; and its object is toincrease the efliciency of such packing.

In the accompanying drawings, Figure 1 is a central longitudinal sectionthrough a stufiing box provided with metallic packing embodying thefeatures of my invention. Fig. 2 is a transverse section through aportion of the devices shown in Fig. 1. Fig. 3 is a top plan view of apacking ring of modified or alternative construction. Fig. 41 is aninner edge view of one segment of the ring shown in Fig. 8. Fig. is atop plan view of another modified or alternative construction, and Fig.6 is an outer edge view of a section of the packing ring illustrated inFig. 5. Figs. 7 and 8 show alternative forms of tongue-and-grooveconnections.

In Fig. 1, a indicates the stuffing box of an engine or pump cylinder,and b the gland, the latter being secured in place by bolts 0. Thepacking, proper, is contained within a casing 1 seated upon the bottomof the stuffing box, a tight joint being made between said casing andthe stuffing box in any suitable way, as, for example, by an annularsoft metal gasket 2. The packing proper is confined between the end wall8 of the casing 1 and a set collar 1, said collar having a screw-threadconnection with the annular wall of said casing.

In the illustrative embodiment shown in Fig. 1, the packing propercomprises two rings, each consisting of six metallic sections. Three ofsaid sect-ions (designated by the numeral 5 in the drawing) are alike insize and form. Alternating with the sections 5 .are smaller sections 6.The lines of division between the sections 5 and 6 are, generallyspeaking, tangential to the periphery of the rod or shaft (Z, thereforeit will be seen that when pressure is applied to the outer side of thesections 5 the sect-ions 6 will tend to move inward.

In order to obtain a fluid-tight joint between the sections 5 and 6, thejoints between said sections are formed of tongues and grooves. In theform of ring shown in Fig.

Specification of Letters Patent.

Application filed March 20, 1909.

Patented Jan. 4, 1910.

Serial No. 484,671.

1 tongues 7 are provided upon the sections 6 to enter grooves 8 in thesections 5, said tongues and grooves being formed upon an angle of Thepacking rings may be surrounded by a band or ring 9.

The means herein shown for holding the sections of each packing ring inclose contact with the rod or shaft consists of a spring 10 secured at apoint between its ends by a screw 11 to the middle of each section 5 andupon the outer side of said section. The ends of the spring 10 bearagainst the outer band 9. The outer sides of the sections 5 and 6 may begrooved as at 12, and each section 5 may have thereon a fiat surface 13to which the spring 10 is secured. Said spring lies within the groove 12and is thereby held against displacement.

If desired, suitable means may be provided for holding a plurality ofpacking rings in proper overlapping relation, as, for example, a pin 14:fixed in one of the sections 5 of one ring and extending into an opening15 in one of the sections 5 of the other ring.

Where the packing is applied to a horizontal rod, means may be providedfor supporting the rings in proper relation to the rod. In Fig. 2 I haveshown a spring 16, the mid-portion of which is attached to the band 9,and the ends of which bear upon the annular wall of the casing 1. Oneend of the spring 16 may be bent to lie in a recess 17 in the casingwall, for the purpose of preventing displacement of said spring.

In use, the sections 5 and 6 are held in close contact with the rod orshaft to be packed, effectually preventing any leakage along said shaft.As the inner surfaces of the sections 5 and 6 wear, the springs 10 movesaid sections inward, the sections 6 sliding upon the tongue and groovejoints. Said joints, by reason of the considerable extent of contactingsurface between the tongues and the grooves, serve efliciently toprevent leakage between the sections of the packing rings.

In Fig. 3 is illustrated a packing ring of three similar sections 18,the joints between the sections being on tangential lines, as in thecase of the six-section rings just described. Tongue and groove jointsare formed between the sections 18. Each section is provided with aspring 19 secured at its middle to the middle of the section, the endsof said springs bearing upon a surrounding band 20. As the sections 18wear, the tongued ends slide inwardly upon the grooved ends under theaction of the springs 19.

Fig. 5 shows a packing ring consisting of four similar sections 21slidably connected by tangential tongue and groove joints. Each section21 is held in close contact with the rod or shaft by a spring 22 securedto the section and bearing at its ends upon an inclosing ring 23.

The tongues and grooves in the various packing rings herein illustratedneed not be V-shape, but may be of various forms, as, for instance, theshapes shown in Figs. 7 and 8. The last mentioned shapes, however, aresubstantially V-shape, for the reason that they are adapted to provide afluid-tight joint by pressure placed upon the segments, the tonguesbeing forced into close contact with the walls of the grooves.

In practice, I have found the three-section rings best suited forpacking rocking rods,

*and the four-section and six-section rings for reciprocating rods.

Because of the great extent of contacting surface between the tonguesand grooves of my improved rings, fewer rings are required in a givenpacking than would be needed if rings of the constructions heretoforeknown were used.

It will be understood that the tongues and grooves may be formed uponvarious angles, that the thickness of the rings will vary with thediameter of the rod and the angle of the tongue and groove connections,

and that any required number of rings may be used.

l Vhen my improved packing is to be applied to engines not speciallyadapted for its use, a casing to hold the packing rings may besubstituted for the ordinary gland and secured in place on the stuffingbox, as shown in Figs. 1 and 2 of Patent No. 907,597, issued to me onDecember 22, 1908.

I claim as my invention:

1. A metallic packing ring consisting of three similar sectionsalternating with three smaller sections, said sections having slid ingV-shape tongue-and-groove joints between them, the tongues being adaptedto be pressed into fluid-tight contact with the Walls of the grooves.

2. A metallic packing ring consisting of a plurality of sections havingsliding V-shape tongue-andgroove oints between them, said joints beingformed on lines tangential to the rod to be packed.

3. A metallic packing ring consisting of a plurality of sections, andindividual leaf springs secured to sections of the ring, the sectionsthat have springs secured thereto being grooved in their outer edges tohold the springs from displacement, the springs being secured by theirmiddle portions to the middle portions of the sections and being ofsubstantially the same length as their sections.

FRANK HENNEBOHLE.

\Vitnesses J. RAYMOND Bonsn, GEORGE L. GHINDAHL.

